1. Warm Working (Material Working Condition):
There is no previous definition.
Definition:
Many
texts take the simplistic approach that a metal worked below its recrystallization
temperature is deemed to have been cold worked, even though this temperature
may be much higher than ambient temperature. Although it is true that a metal
worked below its recrystallization temperature no longer acts as a truly
plastic material, there is an intermediate option, and this is called warm
working.
Warm
working, although not a totally stress-free process, is useful for working high
yield strength, highcarbon steels. By heating the metal to a temperature
between 0.3 and 0.5 of its absolute melting point, the deformation forces
required are much reduced compared with cold working and consequently tool life
is greatly improved. Some work hardening does occur, but accurate parts are
produced with a surface finish approaching that obtainable by cold working.
(Waters,
F., Fundamentals of Manufacturing for Engineers, p. 45)
Günaydın Metin,
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